| Country: | IND |
| Type: | SH |
| State: | Karnataka |
| Districts: | Mysuru, Hassan |
| Route: | 21 |
| Direction A: | North |
| Terminus A: | Halebeedu |
| Direction B: | South |
| Terminus B: | Ane Chowkur |
| Length Km: | 123.17 |
| Destinations: | Halebeedu, Hassan, Ramanathapura, Periyapatna, Nagarahole National Park |
| Maint: | Karnataka Road Development Corporation Limited |
State Highway 21 also known as SH-21 is a state highway connecting Halebeedu of Hassan and Ane Chowkur forest of Mysuru district, in the south Indian state of Karnataka. It has a total length of 123.17km (76.53miles).[1]
Major towns and villages on SH-21 are: Halebeedu, Rajagere, Kyathanakere, Ramadevarahalla kaval, Kondajji, Salagame, ISRO Master Control Facility-Govindapura, Mavinahalli, Dasara Koppalu, Hassan, Hanumanthapura, Agile, Kattaya, Gorur, Ankanayakana halli, Arkalgudu, Mokali, Baraguru, Dodda Magge, Mugaluru, Ramanathapura, Maradi, Raagimaruru, Mallapura, Halaganahalli, Gorahalli, Bettadapura, Coorgal, Eechuru, Hitnehebbagilu, Periyapatna, Boodithittu and Ane Chowkur (Nagarahole).
Terminal at Halebeedu
at Hassan
at Hassan
at Agile
at Arakalgudu
at Ramanathapura
at Periyapatna
Terminal at Ane Chowkur